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Upgraded eMAC G4 to OS 10 and have display problem

Just upgraded an eMAC G4 to OS 10 and the display only fills part of the screen. There is a wide black margin, like a mat around a picture. When I switch the startup disk back to OS 9, the display fills the screen. No choices/can't change display settings in the Control panel when in OS 10. Thank you.

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  • dines_25833 Jul 24, 2009

    There is no "geometry" tab in Preferences > Display on my computer. No choice of resolution and the Refresh Rate is grayed out and says n/a. Also, when I click on display, two screens with two different resolutions appear. Any other ideas?

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You SHOULD be able to control the monitor adjustments in os 10. In the Displays section of the System Preferences, look for the "geometry" tab. Under this tab you should be able to control width and height so your display fills the entire screen.
If you still can't find it, try adjusting the resolution and refresh rates. Also use the "detect displays" button.

Posted on Jul 17, 2009

  • minespress Jul 24, 2009

    Do you have an external display connected to this eMac? That would be the only way two display windows would appear, in my experience.


    And if you do have an external monitor connected, it may not have the "geometry" tab, especially if it is a flat screen. Do neither of your display windows have the "geometry" tab?


    Does this happen with every user account? If you only have one user account, try making a new one. Log in to that account, and see if you can set up the display correctly then. If you can, then there is a problem in your first user account's display preferences. You can delete these preferences, but it is tricky. I won't go into that unless the new user account works for you. Of course, you could just use the new account and delete the old one. (but make sure to move any documents from the old account to the new one first).

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